C :

#include<stdio.h>
int main()
{
	int n;
	scanf("%d",&n);
	if(n>0)
	{
	printf("+\n");
	}
	else if(n<0)
	{
	printf("-\n");
	}
	else if(n==0)
	{
	printf("0\n");
	}
}

C++ :

#include<stdio.h>
int main()
{
    int a;
    scanf("%d",&a);
    if(a>0)
    printf("+");
    if(a<0)
    printf("-");
    if(a==0)
    printf("0");
    return 0;
}

Java :

import java.util.Scanner;
public class Main {
    public static void main(String[] args){
        Scanner input=new Scanner(System.in);
        int n=input.nextInt();
        if(n>0) System.out.println("+");
        else if(n<0) System.out.println("-");
        else System.out.println(n);
    }
}

Python :

# coding=utf-8
#python2
x=int(input())
if x>0:
    print('+')
elif x<0:
    print('-')
else:
    print('0')

C# :

using System;
using System.Collections.Generic;

using System.Linq;
using System.Security.Cryptography;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp2
{
    internal class Program
    {
        static void Main()
        {
            //int[] days = { 31,28,31,30,31,30,31,31,30,31,30,31};
            /*int n = Convert.ToInt32 (Console.ReadLine());
            string[] a1 = Console.ReadLine().Split();
            double r = Convert.ToDouble(a1[0]);
            double b = Convert.ToDouble(a1[1]);
            double c = Convert.ToDouble(a1[2]);
            float pi = 3.1415926f;
            string S = ((r + b+c) / n).ToString("0.00");
            */
            int a=Convert.ToInt16( Console.ReadLine());
            string b = "-";
            if (a >0) {
                b = "+";
            }
            else if(a==0) { b = "0"; };
            Console.WriteLine(b);

            Console.ReadKey();

        }
    }
}